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Finding the Fourth Proportional to 7,218.30, 10,775.22 and 6,343.50

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Solution

The fourth proportional to 7,218.30, 10,775.22 and 6,343.50 is: 9,469.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,218.30 : 10,775.22 = 6,343.50 : x
  2. Step 2: Convert to fraction form
    7,218.30/10,775.22 = 6,343.50/x
  3. Step 3: Cross multiply
    7,218.30x = 10,775.22 × 6,343.50
  4. Step 4: Simplify right side
    7,218.30x = 68,352,608.07
  5. Step 5: Solve for x
    x = 68,352,608.07/7,218.30
  6. Step 6: Final answer
    x = 9,469.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.